Only validate certificate and set client certificate tp authn request.

Made it possible for the IdP to only validate the certificate without
verifying the signature.
This is needed when the proxy sends the SP certificate to the IdP.

Made it possible to send the certificate that should be used during the
creating of the authn request.
Merge remote-tracking branch 'upstream/master'
Removed imports.
Added pytz
Merge pull request #87 from HaToHo/master

Only validate certificate and set client certificate tp authn request.
Fixed conflicts
Added requirement on pyOpenSSL
Cleaned up a bit
Removed IDP example
Added example SP not using repoze.who .
Brought example IdP using repoze.who back.
Brought example IdP using repoze.who back.
IDP logout fix, add .gitignore

Make IDP logout a little more resilient by double checking content in the cache.
Added some .gitignore for generated and copied files in idp, sp and idp2 folders.
Allow both sp and idp2 to be mounted using wsgi container.
Add static handler for css and other files in idp2.
Merge pull request #90 from richtera/master

IDP logout fix, add .gitignore, and more....
Merge branch 'master' of github.com:rohe/pysaml2
Starting point for an example IdP using repoze.who .
Added code that allows encryption of an assertion in a response.
Added a metadata extension (algsupport).
Editorial
Refactored class methods